Across the Deserts

　　The SaharaDesertis the largest desert in the world. It stretches across Africa fromSenegaltoEgypt. TheSaharaDesertis an unfriendly environment. During the day it"s very hot, and at night it’s sometimes very cold. It is also difficult to find water in theSahara.

　　In 2006, Kevin Lin, Ray Zahab, and Charlie Engle decided to do something very difficult. They made the decision to run across the Sahara Desert 4,300 miles (6,920km). It seemed impossible to do, but they wanted to try. The three men liked to test themselves, and this would be a very big test.

　　On the morning of November 2, Kevin, Ray, and Charlie started their trip across theSahara. Every morning they began running at 5:00. At11 a.m. they stopped and rested until 5 p.m. Then they ran again until 9:30 in the evening. Each day they ran about 40 miles (64 km). Every day it was the same thing. They got up and ran. They listened to music on their iPods, and they ran and ran.

　　Kevin, Ray, and Charlie needed to eat a lot of food during their trip. Most people need about 2,000 calories of food each day. Kevin, Ray, and Charlie needed between 6,000 and 9,000 calories every day. That"s a lot of food! They also needed to drink a lot of water.

　　The three men had some problems on their trip, and many times they wanted to quit and go home. It was often very hot (140°F/60°C) during the day, and the heat made them sick. Their legs and feet hurt. Sometimes it was very windy, and they couldn"t see. One time they got lost. But they didn"t quit. After 111 days, Kevin, Ray; and Charlie successfully finished their trip across theSaharaDesert. They hugged each other and put their hands in the water of theRed Sea. Then they ran to a hotel to take a long shower.

　　词汇：

　　Stretch / strɛtʃ / v. 延伸，伸展

　　Calorie / "kælərɪ / n. 卡(路里)，小卡，大卡

　　Quit / kwɪt / v. 停止，放

　　注释：

In the middle of the day: the men usually stopped running.

A:Right B:Wrong C:mentioned

一幅分辨率为640×480的真彩色图像占用的存储空间为（）。

A:（640×480×8）/8B B:（640×480×3×8）B C:（640×480×3×8）/2B D:（640×480×3×8）/8B

一幅分辨率为640×480的真彩色图像占用的存储空间是（）。

A:(640×480×8)/B B:(640×480×3×8)B C:(640×480×3×8)/2 B D:(640×480×3×8)/8 B

一幅分辨率为640×480的256色未压缩图像的数据量最小约为（）K字节。

A:150 B:200 C:250 D:300

以下程序的运行结果是（）
int k=0;
void fun(int m)
m+=k; k+=m; printf(”m=%d k=%d”, m, k++);
main（　）
int i=4;
fun(i++); printf("i=%d k=%d/n", i, k);

A:m=4 k=5 i=5 k=5 B:m=4 k=4 i=5 k=5 C:m=4 k=4 i=4 k=5 D:m=4 k=5 i=4 k=5

下面程序的输出是______。
main（　）
int k=11；
printf("k=%d,k=%o,k=%x/n",k,k,k);

A:k=11,k=12,k=11 B:k=11,k=13,k=13 C:k=11,k=013,k=0xb D:k=11,k=13,k=B

以下程序的运行结果是

int k=0;

void fun(int m)

m+=k;k+=m;printf("m=%d k=%d",m,k++);

main( )

int i=4;

fun(i++);

printf("i=%d k=%d/n",i,k);

A:m=4 k=5 i=5 k=5 B:m=4 k=4 i=5 k=5 C:m=4 k=4 i=4 k=5 D:m=4 k=5 i=4 k=5

WTgg我28K

A:V&gg国99k B:RFnn民36Y C:GcDc泰28K D:☆&ee安55K

当达到K+平衡电位是（ ）

A:膜两侧K+浓度梯度为零 B:膜外K+浓度大于膜内 C:膜内K+净外流为零 D:膜内电位较外电位相对为零